This January 2016 photo provided by Carrie Goldman shows a letter sent to Hasbro by her daughter, Annie Rose, complaining that the toymaker did not produce a figurine of Rey, the latest Star Wars movie heroine, for it's Star Wars: Monopoly set. (Carrie Goldman via AP/Disney/Lucasfilm via AP, File)

The "Star Wars" version of Monopoly will add a game piece based on the female character Rey. The decision came after an 8-year-old girl wrote to game maker Hasbro. She complained about the error and said: "Girls matter."

Carrie Goldman is from Evanston, Illinois. She posted a letter on Twitter written by her daughter, Annie Rose. The girl asked why Hasbro left out Rey when she is a main character of the latest movie in the series, "Star Wars: The Force Awakens."

The letter begins by asking the company why it would leave out the heroine of the story.

"Without her THERE IS NO FORCE AWAKENS! It awakens in her! And without her, the bad guys would have won! Besides, boys and girls need to see that women can be as strong as men!" she wrote. "Girls matter!"

The original game includes just four pieces. They all are modeled on male characters. They are Luke Skywalker, Darth Vader, Finn and Kylo Ren. The decision to leave out Rey led to a social media debate. Many fans tweeted under the hashtag #WheresRey.

Goldman is an author. She has written about toys and gender issues. She included the hashtag as she tweeted a picture of her daughter's letter to Hasbro.

Hasbro responded in a tweet of its own.

"We love your passion for Rey. And (we) are happy to share that we are including her in the Monopoly: Star Wars game, available later this year," it said.

Julie Duffy is a spokeswoman for Hasbro. The company is based in Pawtucket, Rhode Island. She said it did not include Rey in the game to avoid revealing a key plot line. The game was released in September. That was months before the movie was released. Goldman noted that at the time it was well known that Rey would be a central character.

Goldman said the response to Annie Rose's letter shows she struck a nerve. And that people are ready for a change.

"A huge number of the messages I'm getting are from men. This is not a women's issue. It's about representing the hero of this film," she said.

Duffy said anyone who already bought a Rey-less game can contact Hasbro when the updated game comes out and request their own Rey token.